How does Carlos Castaneda use imagery in The Eagle's Gift?

Imagery:

'The other row of columns, the rectangular ones, represent the order of the first attention, the tonal. They are stalkers, that's why they are covered with inscriptions. They are very peaceful and wise, the opposite of the first row.'

"I told him how mystified I was and urged him to continue talking. He seemed undecided, stared at me for a moment, and took a deep breath. He had hardly begun to speak when the voices of the rest of them were raised in a clamor of protest."

"The Eagle is devouring the awareness of all the creatures that, alive on earth a moment before and now dead, have floated to the Eagle's beak, like a ceaseless swarm of fireflies, to meet their owner, their reason for having had life."